Contents: Includes 1 plug-in diffuser and 2 refill vials designed to provide up to 60 days of continuous use. Purpose: Uses calming pheromones to help reduce canine stress, separation anxiety, excessive barking, destructive behavior, and house-soiling. Coverage Area: Covers up to 700 square feet. Safety: Drug-free, odor-free, and safe for humans and pets when used as directed. Exp 14/11/28